/*界面整体居中*/
*{
    text-align: center;
    margin: 0 auto;
    padding: 0;
    
}

/*设置图片背景*/
#all {
    background-image: url(./background.jpg);
    background-size: 500px 850px;/*设置图片大小*/
}
img{
    margin-top: 30px;
}

a{
    text-decoration: none;
    color: black;
}

input[type="button"]{
    border-radius: 20px;
    width: 300px;
    height: 30px;
    color: black;
    font-size: 18px;
    background-color: #EFA554;
    }
